Watch something never before caught on tape - the exotic bird of paradise mating ritual. Discovery Channel's 11-part series PLANET EARTH will amaze viewers with never-before-seen animal behaviors, startling views of locations captured by cameras for the first time, and unprecedented high definition production techniques. Award-winning actress and conservationist Sigourney Weaver joins Discovery Channel as narrator. PLANET EARTH airs on consecutive Sundays from March 25 through April 22, 2007 on Discovery Channel and in high definition on Discovery HD Theater.